Jiří Kunčar
Code alchemist and Python enthusiast who turns database internals and auth protocols into boring, reliable platforms. I know plenty of buzzwords and try to use them carefully; I like helping people and I am not afraid to ask for help.
Experience
Pydantic
The team behind Pydantic, Pydantic AI and Logfire.
Member of Technical Staff
Own identity and access for the Logfire platform: built its OAuth 2.0 authorization server, OIDC workload identity federation and passkeys, and led the phased migration of every credential type onto unified API keys. Set reliability and engineering standards across the codebase, from bounded Postgres and Redis failure modes to CI-enforced lint rules.
Veeva Systems
The Industry Cloud for Life Sciences.
Engineering Manager
Led the engineering team building Link Workflow, after bootstrapping the Link Key Accounts and Link SiteBase products.
Datadog
Observability and security platform for cloud applications.
Software Engineer
Built the pipeline that generates Datadog's API clients and reference documentation from its OpenAPI specification, and automated validation and integration testing across all client languages with CI monitors, alerts and full stack traces.
StubHub
Online ticket marketplace, part of eBay at the time.
Software Engineer
Migration of a legacy system. Improvements to testing strategies and internal documentation.
Swiss Data Science Center
A partnership between École Polytechnique Fédérale de Lausanne (EPFL) and Eidgenössische Technische Hochschule Zürich (ETHZ).
Senior Software Engineer
Designed and built core parts of the center’s Insights-as-a-Service platform, a hosted one-stop shop for accessing, exchanging and exploring possibly anonymized data at scale and for building and deploying data science workflows.
CERN
The European Organization for Nuclear Research, known as CERN, is a European research organization that operates the largest particle physics laboratory in the world. Wikipedia
Software Engineer Staff Member
Design and development of 70+ modules for Invenio digital library framework that handles scientific publications, multimedia material, or research data. Reviewing and integrating code contributed by project partners. Providing support to collaborating institutions (DESY, EPFL, SLAC). Participating in DevOps for the CERN Open Data Portal and Zenodo.org services. Planning project strategy and strengthening community relations. Leading a team of developers.
Software Engineer Technical Student
Preparation and implementation of the infrastructure change of Invenio digital library software from home-grown libraries to well-established Python web technologies Flask and Jinja2. Review and improvement of SQLAlchemy models to enable database independence. Establishing and enforcing coding and documentation standards for a group of developers via continuous integration services.
Open-Source
Articles
Launch AI tools without storing API keys
Pydantic blog,
MCP Code Execution: Why Your Agent Would Rather Write Code
Pydantic blog,
E2E Test Debugging with Distributed Tracing
Pydantic blog,
Publications
source: 
https://orcid.org/0000-0002-3995-3795
Predictable integration and reuse of executable real-time components
Journal of Systems and Software
| journal-article
Real-time component integration using runnable virtual nodes
Proceedings - 38th EUROMICRO Conference on Software Engineering and Advanced Applications, SEAA 2012
| conference-paper
DOI: 10.1109/SEAA.2012.49
Education
Mälardalen University, Västerås, Sweden
A young university with a modern approach to teaching located in one of Sweden’s main business regions. Study in Sweden
Master's programme in Software Engineering
The School of Innovation, Design and Engineering with specialization in real-time embedded systems.
Charles University, Prague, Czech Republic
Founded in 1348, it was the first university in Central Europe. Wikipedia
Master of Computer Science
Faculty of Mathematics and Physics with specialization in database systems.